package com.flnet.spsys.controller;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import java.awt.image.BufferedImage;

@Api(tags = "验证码")
@Slf4j
@Controller
public class KaptchaController {
    /**
     * @Title: loginCheck
     * @param request
     * @param kaptchaReceived
     * @return String
     * @Description:  验证码登录
     */
    @RequestMapping(value = "kaptcha", method = RequestMethod.POST)
    @ResponseBody
    public String loginCheck(HttpServletRequest request,
//	            @RequestParam(value = "username", required = true) String username,
//	            @RequestParam(value = "password", required = true) String password,
                             @RequestParam(value = "kaptcha", required = true) String kaptchaReceived){
        //用户输入的验证码的值
        String kaptchaExpected = (String) request.getSession().getAttribute(
                com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);

        //校验验证码是否正确
        if (kaptchaReceived == null || !kaptchaReceived.equals(kaptchaExpected)) {
            log.info("验证码错了");
            return "kaptcha_error";//返回验证码错误
        }
        //校验用户名密码
        // ……
        // ……
        log.info("验证码对了");
        return "success"; //校验通过返回成功
    }

    /**
     * ClassName: CaptchaImageCreateController
     * Function: 生成验证码Controller.
     * date:
     *
     * @author
     */

    private Producer captchaProducer = null;

    @Autowired
    public void setCaptchaProducer(Producer captchaProducer){
        this.captchaProducer = captchaProducer;
    }

    @RequestMapping("kaptcha.jpg")
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception{
        // Set to expire far in the past.
        response.setDateHeader("Expires", 0);
        // Set standard HTTP/1.1 no-cache headers.
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        // Set standard HTTP/1.0 no-cache header.
        response.setHeader("Pragma", "no-cache");

        // return a jpeg
        response.setContentType("image/jpeg");

        // create the text for the image
        String capText = captchaProducer.createText();

        // store the text in the session
        request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);

        // create the image with the text
        BufferedImage bi = captchaProducer.createImage(capText);

        ServletOutputStream out = response.getOutputStream();

        // write the data out
        ImageIO.write(bi, "jpg", out);
        try {
            out.flush();
        } finally {
            out.close();
        }
        return null;
    }


}